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alina1380 [7]
3 years ago
14

Ralph is looking at a blood vessel under a microscope as part of his study about the cardiovascular system.he notices that the v

essel contains blood and has valves.what is the blood vessel that he is observing?
Biology
1 answer:
-Dominant- [34]3 years ago
7 0

Answer:

Ralph is looking at a vein (likely a muscular vein).

Explanation:

Of all three great types of vessel present in vertebrates (arterial, venous, lymphatic), only veins and lymphatic vessels may normally contain valves.  This is an essential feature of vessels which present low pressure flow, since it ensures that such flow is unidirectional.

Since blood cells are not typically found in lymphatic vessels, the vessel in question can be assumed to be a vein.

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Whats are the functions of the integumentary system ?
Verdich [7]

Answer:

Absorption

Thousands of pores on the surface of the skin can absorb vitamins, acids, water and oxygen in order to provide moisture and nourishment to our skin.

Excretion

The skin is the body’s largest waste removal system. Toxins are released through the sweat glands and pores.

Secretion

The skin secretes sebum, a mixture of oils that keeps the skin soft and supple. The layer of sebum on the outermost layer of the skin is known as the acid mantle. When intact the acid mantle has a PH that ranges from 4.5-5.5. The acid mantle is acidic in nature to protect the skin from outside invasion.

Regulation

The skin regulates the body’s temperature by sweating; when water from sweat on the skin evaporates it gives off heat and cools the body.  The body’s temperature increases or by shivering or getting goosebumps when the body is cold. The contraction of muscles releases energy that warms the body.

Sensation

The skin contains millions of nerve endings that transport stimuli. These nerve endings allow humans to detect sensation such as heat, cold, pain and pressure.

Disclosure: I get a small commissions for purchases made through links in this post.

Sources: Salon fundamentals Esthetics Textbook: The Integumentary System

8 0
3 years ago
(GIVING BRAINLIEST) ______________ energy is the total potential and kinetic energy of particles in an object.
Artyom0805 [142]

Answer:

Thermal

Explanation:

The total kinetic and potential energy of the particles in an object is called thermal energy.

6 0
3 years ago
Which species interaction applies to bees that harvest nectar and pollen from flowers?
Elden [556K]
They are a very good example of mutualism in which each species benefits.  Please mark Brainliest!!!
4 0
2 years ago
Which observation about the Rocky Mountains and the Appalachian Mountains would support the claim that exposure of weathering an
Ostrovityanka [42]

Answer:

B: The shorter and more rounded the Appalachian Mountains are more than four times older than the taller and more jagged Rocky Mountains

Explanation:

  • The Appalachian mountains form a system of mountains in eastern North America and are older than rocky mountains as they were formed 480 million years ago and are similar to those of the alps. They form a barrier to the east to the west.
  • They extend to southeast Canada and form zones of 300 miles wide. They form the mountain ranges surrounding hills and the dissected plateaus forming at an elevation of 6,684 meters from the sea level. <u>Whereas the rocky mountains are younger and have an elevation of 4,401 meters.</u>
3 0
3 years ago
What movements do the quadriceps femoris muscles perform?
Anna71 [15]

Answer:

a. Extension of the lower leg

Explanation: is correct

6 0
2 years ago
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